Structural, Magnetic and THz Emission Properties of Ultrathin Fe/L1 0 -FePt/Pt Heterostructures.
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| Title: | Structural, Magnetic and THz Emission Properties of Ultrathin Fe/L1 0 -FePt/Pt Heterostructures. |
|---|---|
| Authors: | Locovei, Claudiu1 (AUTHOR), Torosyan, Garik2 (AUTHOR), Papaioannou, Evangelos Th.1,3 (AUTHOR), Crisan, Alina D.1,4 (AUTHOR), Beigang, Rene1,4 (AUTHOR), Crisan, Ovidiu1,2 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Jul2025, Vol. 15 Issue 14, p1099. 12p. |
| Subjects: | Heterostructures, Spin Hall effect, Ferromagnetic materials, Submillimeter waves, Platinum alloys, Magnetic coupling, Spintronics |
| Abstract: | Recent achievements in ultrafast spin physics have enabled the use of heterostructures composed of ferromagnetic (FM)/non-magnetic (NM) thin layers for terahertz (THz) generation. The mechanism of THz emission from FM/NM multilayers has been typically ascribed to the inverse spin Hall effect (ISHE). In this work, we probe the mechanism of the ISHE by inserting a second ferromagnetic layer in the form of an alloy between the FM/NM system. In particular, by utilizing the co-sputtering technique, we fabricate Fe/L10-FePt/Pt ultra-thin heterostructures. We successfully grow the tetragonal phase of FePt (L10-phase) as revealed by X-ray diffraction and reflection techniques. We show the strong magnetic coupling between Fe and L10-FePt using magneto-optical and Superconducting Quantum Interference Device (SQUID) magnetometry. Subsequently, by utilizing THz time domain spectroscopy technique, we record the THz emission and thus we the reveal the efficiency of spin-to-charge conversion in Fe/L10-FePt/Pt. We establish that Fe/L10-FePt/Pt configuration is significantly superior to the Fe/Pt bilayer structure, regarding THz emission amplitude. The unique trilayer structure opens new perspectives in terms of material choices for the future spintronic THz sources. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 186956610 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Structural, Magnetic and THz Emission Properties of Ultrathin Fe/L1 0 -FePt/Pt Heterostructures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Locovei%2C+Claudiu%22">Locovei, Claudiu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Torosyan%2C+Garik%22">Torosyan, Garik</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Papaioannou%2C+Evangelos+Th%2E%22">Papaioannou, Evangelos Th.</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Crisan%2C+Alina+D%2E%22">Crisan, Alina D.</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Beigang%2C+Rene%22">Beigang, Rene</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Crisan%2C+Ovidiu%22">Crisan, Ovidiu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jul2025, Vol. 15 Issue 14, p1099. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Heterostructures%22">Heterostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Spin+Hall+effect%22">Spin Hall effect</searchLink><br /><searchLink fieldCode="DE" term="%22Ferromagnetic+materials%22">Ferromagnetic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Submillimeter+waves%22">Submillimeter waves</searchLink><br /><searchLink fieldCode="DE" term="%22Platinum+alloys%22">Platinum alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+coupling%22">Magnetic coupling</searchLink><br /><searchLink fieldCode="DE" term="%22Spintronics%22">Spintronics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Recent achievements in ultrafast spin physics have enabled the use of heterostructures composed of ferromagnetic (FM)/non-magnetic (NM) thin layers for terahertz (THz) generation. The mechanism of THz emission from FM/NM multilayers has been typically ascribed to the inverse spin Hall effect (ISHE). In this work, we probe the mechanism of the ISHE by inserting a second ferromagnetic layer in the form of an alloy between the FM/NM system. In particular, by utilizing the co-sputtering technique, we fabricate Fe/L10-FePt/Pt ultra-thin heterostructures. We successfully grow the tetragonal phase of FePt (L10-phase) as revealed by X-ray diffraction and reflection techniques. We show the strong magnetic coupling between Fe and L10-FePt using magneto-optical and Superconducting Quantum Interference Device (SQUID) magnetometry. Subsequently, by utilizing THz time domain spectroscopy technique, we record the THz emission and thus we the reveal the efficiency of spin-to-charge conversion in Fe/L10-FePt/Pt. We establish that Fe/L10-FePt/Pt configuration is significantly superior to the Fe/Pt bilayer structure, regarding THz emission amplitude. The unique trilayer structure opens new perspectives in terms of material choices for the future spintronic THz sources. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano15141099 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1099 Subjects: – SubjectFull: Heterostructures Type: general – SubjectFull: Spin Hall effect Type: general – SubjectFull: Ferromagnetic materials Type: general – SubjectFull: Submillimeter waves Type: general – SubjectFull: Platinum alloys Type: general – SubjectFull: Magnetic coupling Type: general – SubjectFull: Spintronics Type: general Titles: – TitleFull: Structural, Magnetic and THz Emission Properties of Ultrathin Fe/L1 0 -FePt/Pt Heterostructures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Locovei, Claudiu – PersonEntity: Name: NameFull: Torosyan, Garik – PersonEntity: Name: NameFull: Papaioannou, Evangelos Th. – PersonEntity: Name: NameFull: Crisan, Alina D. – PersonEntity: Name: NameFull: Beigang, Rene – PersonEntity: Name: NameFull: Crisan, Ovidiu IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 07 Text: Jul2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 15 – Type: issue Value: 14 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
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